phobos dependencies

[Andrei Alexandrescu]

On 1/5/14 8:44 PM, Kenji Hara wrote:
> Honestly, "lazy import" (== defer loading module file and running
> semantic analysis for symbol search) would improve compilation speed for
> selective imports and static imports, but it would have no merit for
> basic imports.
>
> So precisely, "all imports lazy would be a net large win." is not correct.

Consider:

import std.stdio;
void main() { writeln("Hello, world!"); }

Currently std.stdio and all modules transitively imported by it would be 
opened.

With lazy imports, std.stdio gets opened and then writeln() gets 
semantically analyzed. Only modules required by writeln() itself will 
actually be opened. Big difference.


Andrei